The grain stability of calcined petroleum coke determines the resistance to breakdown of +4 mm particles used in the manufacture of carbon anodes for use . Designation: D/DM − Standard Practice for. Collection and Preparation of Coke Samples for Laboratory Analysis1 This standard is issued under the. ASTM D Standard Practice for Collection and Preparation of Coke Samples for Laboratory Analysis.

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Method for charcoal and charcoal briquettes.

Combining values from the two systems may result in non-conformance with the standard. Note down the different weights in percentage of the total initial weight in the following order: A capacity of about litres is adequate. The analysis samples can be used to determine the value of the coke represented, its ability c346 meet specifications, as well as for other purposes.

For charcoal and charcoal briquettes. The retort is filled to about 0.


Accurately weigh one gramme of the dry powdered sample and insert it into the calorimeter following the instructions given by the equipment supplier. These results are combined with the sieve analysis of the fine material excluded from the tumbler test to give a total evaluation of the charcoal’s quality.

Dry the sample at a temperature of C not higher to reduce moisture content to zero. A simple apparatus for these tests is shown in Fig. The container is made of copper or stainless steel and constitutes in effect a small closed retort. Price variations may also apply where standard quality indicators are not met. The charcoal maker engaging in export business may rely on his partners abroad, who are normally well equipped, and have capable staff to deal with problems which arise and provide customers with advice.

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Testing must follow standardized methods in all cases to ensure that the results can be compared and the analysis repeated. The electronic file may not be reproduced in any way.

It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Register for a trial account. When the required temperature is reached the retort is allowed to cool e346 room temperature and the yield of charcoal, tars and pyroligneous acid measured by weighing. A correction can be made for moisture content to express ash on a moisture free basis.

Asstm carbon content is an important parameter in steel making charcoal since this is the agent which reduces the iron ore to metallic iron and limits which must be met are often specified.

A white precipitate of barium sulphate will immediately appear. This practice also provides an analysis sample of coke from the gross or divided sample. Prepare sample as above. According to estimated ash content accurately weigh three or five grammes in a platinum or porcelain crucible with lid.

This practice also provides an analysis sample of coke from the gross or divided sample. Crush sample in a porcelain mortar and accurately weigh 3 grammes. The value for the fixed carbon is calculated as follows: Screen size, ash content and friability are also often specified by large buyers. The difference between initial weight and weight of sample after combustion will be expressed as a percentage of the initial weight and represents the ash content.

Values are state ins SI units when inch-pound units are not used in practice.

The most common test used in viscosity determination of pyroligneous acid is the Engler-scale. After cooling, the contents of the beaker are poured through a weighed glass filter which collects the barium-sulphate precipitate.


The lid should have a hole in the centre of a diameter of 1. Accurately weigh grammes of dried sample and put it on screen No. Historical Version s – view previous versions of standard. Put the hot crucible into a desiccator with calcium chloride as a desiccant, until the sample has cooled. After minutes, open the gas adjusting screw and the air control of the Bunsen burner to full capacity and continue heating until the small flame above the pinhole of the lid has ceased.

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ASTM D346/D346M – 11

Continue procedure as described for raw material above. This is to prevent the finer charcoal cushioning the effect of rumbling on the coarse material during the test. The most common set is: However, they have great value for comparison between various raw materials since the behaviour of known materials can be compared with new type raw materials or the effect of changing carbonisation temperature can be studied in a comparative way.

The retort should be heated gently with the burner flame to allow the moisture to be driven off and avoid overheating of the charge at any point.

By heating charcoal with exclusion of air oxygen volatile matter and gases are expelled. Grinding is not recommended because the heat generated would already drive off part of the d364. Please login to your authorized staff account to use this feature.

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